Ecological validity may be threatened by the:
a. experimenter's expectations.
b. experimenter's personality.
c. experimenter's research assistant.
d. all of these
D
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By what age is a child's attachment style typically established?
a. 3 months b. 9 months c. 2 years d. 5 years
When a behavior occurs again after it had not occurred for some time due to extinction, the process is called
a. operant behavior b. extinction burst c. resurgence d. spontaneous recovery
According to the 2011 National Survey on Drug Use and Health, ___________ of 18-25-year-old respondents reported at least one instance of illicit drug use in the past year
a. less than 10% b. between 10% and 25% c. between 25% and 50% d. more than 50%
Most popular self-help books, like the kind sold in mall bookstores:
a. are never evaluated to see if they actually help people. b. do help people, but in unexpected ways. c. definitely do not help people. d. help some people, but do not help others.